Until the roof has moved out - paint it white

Nobel laureate, US Secretary of Energy, Stephen Chu believes that all the roofs in the world need to be repainted in white.
According to him, white color reflects more solar energy than any other. So, having painted all the roofs white, we will get a cleaner atmosphere, since the reflection and return of solar energy back into space will reduce greenhouse gas emissions, with the result that we will get huge savings on air conditioning. The same effect can stop all cars next 11 years. As well as he proposes to do the same with roads and sidewalks. According to his recommendations in California since 2005, the state authorities have already insisted that the owners of commercial buildings paint the roofs white. Dr. Rosenfeld and his colleagues at Lawrence's lab found that repainting the roofs of houses in white even in 100 large cities would lead to a reduction in carbon dioxide emissions into the atmosphere by 44 billion tons. But there is only one question: how much will such an event cost the states and where will they get the money for it during the crisis.